Bass Swell

A slow warm bass swell with an opening filter that lifts into a new scene

one-shot · 2.64 s · 0 downloads · 0 likes

0.00 / 2.64 sMP3 preview · Warm grit

Preset

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Free for commercial use. No attribution needed.

Tweak

renders in the CLI · WAV

Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.

Command

$ sb get CS53WMPY8Y@1 --preset gritty -o bass-swell.wav

Source: a bowed-bass style swell. A sine sub at the root (55 Hz) carries the weight; two detuned saws an octave up (±6 cents) and a triangle at the fifth add harmonics that a filter can reveal. A little pink noise is the bow/air texture.
Body: a 12 dB low-pass opens from 90 Hz to 1.1–3.5 kHz (Q ≈ 1.1), so harmonics enter one by one as the scene lifts. A tanh saturator after the sum adds warm harmonics that grow with level.
Envelope: a pure crescendo: level rises along a power curve to its peak at ~75 % of the length, then a short release lets the swell resolve; pitch drifts up ≈ 1.5 % to add lift.
Variation: `rng` shifts the saw detune and the peak time by a few percent; presets change root, sweep range, drive and noise.

Parameters
Parameter	Range	Default	Unit	Controls
length	1.2 – 5	2.5	s	Length
root	36 – 110	55	Hz	Root
brightness	0 – 1	0.5	—	Brightness
warmth	0 – 1	0.5	—	Warmth
air	0 – 1	0.25	—	Air
seed	int	1	—	Variation, reproducible

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.

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